521528 divided by 17 
The aim is to understand the frequency of 17 in 521528.

Advancing to step 1:
5 divided by 17 is 0 with a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Grab the next digit (2) from the dividend, add it to 5, then carry on: 52 / 17

Going ahead to step 2:
If we divide 52 by 17, we get 3 and a remainder of 1.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Subtracting 51 from 52 leaves us with 1.
Append the next digit (1) from the dividend to 1 and continue with: 11 / 17

Advancing to step 3:
When dividing 11 by 17, we get 0 with a remainder of 11.
Use 0 as the next digit of our solution. 
Result so far: 30.0
Subtract 0 from 11 to get 11.
Bring next digit (5) of the dividend behind the 11 and repeat the process: 115 / 17

Step 4:
When dividing 115 by 17, we get 6 with a remainder of 13.
Put 6 as the next digit of the answer. 
Result so far: 306.0
The remainder is 13 after subtracting 102 from 115.
Grab the next digit (2) from the dividend, add it to 13, then carry on: 132 / 17

Let's proceed to step 5:
17 goes into 132 7 times with a remainder of 13.
The next digit of our result is 7. 
Result so far: 3067.0
Subtract 119 from 132 to get 13.
Grab the next digit (8) from the dividend, add it to 13, then carry on: 138 / 17

Going ahead to step 6:
17 goes into 138 8 times with a remainder of 2.
Record the quotient 8 as the next digit in the result. 
Result so far: 30678.0
Subtract 136 from 138 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 7:
The number 17 fits into 20 1 times, leaving a remainder of 3.
Put 1 as the next digit of the answer. 
Result so far: 30678.1
If we take 17 away from 20, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 8:
30 divided by 17 is 1 with a remainder of 13.
Record the quotient 1 as the next digit in the result. 
Result so far: 30678.11
The remainder is 13 after subtracting 17 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

The final result is 30678.11 with a remainder of 0.013.